A new species of soft-shelled turtle (Trionychidae) from the Middle Eocene of Ukraine

@article{Danilov2011ANS,
  title={A new species of soft-shelled turtle (Trionychidae) from the Middle Eocene of Ukraine},
  author={Igor G. Danilov and Evgenij Zvonok and Elena V. Syromyatnikova and N. I. Udovichenko},
  journal={Proceedings of the Zoological Institute RAS},
  year={2011}
}
Trionyx ikoviensis sp. nov., a new species of soft-shelled turtles (Trionychidae: Trionychinae), is established based on a partial but well preserved skull, isolated shell bones and cervical vertebrae VII and VIII from the Middle Eocene (Early Lutetian) Ikovo locality in the Luhansk Province of Ukraine. Trionyx ikoviensis cannot be assigned to any modern group within Trionychinae, but demonstrates most similarities with Trionychini (sensu Meylan 1987). Among fossil forms, T. ikoviensis is most… 

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References

SHOWING 1-10 OF 29 REFERENCES
Middle Eocene Pelagornithidae and Gaviiformes (Aves) from the Ukrainian Paratethys
TLDR
The Ukrainian fossils document profound differences between middle Eocene and extant marine avifaunas of Europe, and whereas themiddle Eocene Paratethyan avifauna appears to have been similar to that of the North Sea with regard to pelagornithid diversity, the absence of prophaethontids and relative abundance of Gaviiformes may indicate faunistic differences concerning the remaining seabirds.
New Material of Gilmoremys lancensis nov. comb. (Testudines: Trionychidae) from the Hell Creek Formation and the Diagnosis of Plastomenid Turtles
TLDR
A phylogenetic analysis of all well-known plastomenid turtles establishes Gilmoremys lancensis as the most basal known plASTomenid and reveals that cranial characters are more reliable in diagnosing plastomid turtles, in particular the contribution of the parietal to the orbit wall and the extensive secondary palate.
Itilochelys rasstrigin gen. et sp. nov, a new hard-shelled sea turtle (Cheloniidae sensu lato) from the Lower Paleocene of Volgograd Province, Russia
TLDR
A new hard-shelled sea turtle is established based on a partial skull, two lower jaws, a humeral bone and cervical vertebrae I–III from the Lower Paleocene of Volgograd Province, Russia and represents the most complete finding of these turtles in Russia.
New Turtle Remains from the Late Cretaceous and Paleogene of Volgograd Region, Russia
Fragmentary remains of Cryptodira incertae sedis sp. 1 (dentary, scapular fragments, and neural; Rasstrigin 1, Maastrichtian), Cryptodira incertae sedis sp. 2 (fused epiplastra with two pairs of
Die Zoogeographie der känozoischen Weichschildkröte Trionyx triunguis FORSKÄL 1775 (Testudines: Trionychidae)
The original European Trionychinae derives from upper Cretaceous turtles of the Tribus Trionychini of North America. The immigration of these hitherto unknown taxa took place at the end of the
Remains of sea turtles from the Ikovo locality (Lugansk Region, Ukraine; Middle Eocene)
Fragmentary remains of sea turtles (Cheloniidae sensu lato: Argillochelys sp., Puppigerus nessovi Averianov, 2005, and Cheloniidae gen. indet.) from the Ikovo locality (Lugansk Region, Ukraine; Lower
Multiple data sets, high homoplasy, and the phylogeny of softshell turtles (Testudines: Trionychidae).
TLDR
A strong estimate of the phylogeny of softshell turtles is used as the basis for a novel rank-free classification, and strategies for analyzing highly homoplasious mtDNA data in deep phylogenetic problems where increased taxon sampling is not an option are examined.
New fossil reptil material (reptilia: Chelonii, Crocodylia) from the Lower Oligocene of Borken (Central Germany: Hesse)
The fossil turtles and crocodiles from the marine Early Oligocene of the Borken basin are described and compared with related species of the same stratigraphical age. Additionally, an overview is
Review of Mesozoic and Cenozoic Sea Turtles from the Former USSR
A list of 51 localities of fossil sea turtles from the Middle Jurassic, Early and Late Cretaceous, Paleocene, Eocene and Miocene of Russia, Uzbekistan, Kazakhstan, Tajikistan, and Ukraine is
Some Turtle Remains from the Cretaceous and Paleogene of Volgograd Region, Russia
Fragmental remains of a chelosphargine Teguliscapha (?) sp. (Cenomanian), large sized Chelonioidea indet. (possibly protostegid) (Campanian), cheloniid Osteopyginae indet., as well as Trionychidae
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